Here Mudassar Ahmed Khan has explained with an example, how to validate TextBox inside GridView using JavaScript on Button Click in ASP.Net.

When the Submit Button is clicked, using a FOR loop, all the TextBoxes inside the GridView will be validated and respective Error messages will be displayed using JavaScript in ASP.Net

Here Mudassar Ahmed Khan has explained with an example, how to check uncheck all (select unselect all) CheckBoxes in ASP.Net CheckBoxList using C# and VB.Net.

The check uncheck all functionality will be done using an additional CheckBox that will act as Check All CheckBox for the ASP.Net CheckBoxList control.

Here Mudassar Ahmed Khan has explained with an example, how to use multiple Regular Expression (Regex) Data Annotation attributes for validation in ASP.Net MVC Razor.

The validation will be performed on Client Side using Model class and multiple Regular Expression (Regex) Data Annotation attributes in ASP.Net MVC Razor.

Here Mudassar Ahmed Khan has explained with an example, how to enable or disable TextBox in GridView based on condition in ASP.Net using C# and VB.Net.

Inside the OnRowDataBound event handler, the TextBox will be referenced and disabled based on some condition in ASP.Net using C# and VB.Net.